2012-05-07 00:48:58 +08:00
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//=====================================================================
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//
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2017-02-02 12:07:40 +08:00
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// test.cpp - kcp 测试用例
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2012-05-07 00:48:58 +08:00
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//
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2017-02-02 12:07:40 +08:00
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// 说明:
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2012-05-07 00:48:58 +08:00
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// gcc test.cpp -o test -lstdc++
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//
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//=====================================================================
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#include <stdio.h>
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#include <stdlib.h>
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#include "test.h"
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#include "ikcp.c"
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2017-02-02 12:07:40 +08:00
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// 模拟网络
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2012-05-07 00:48:58 +08:00
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LatencySimulator *vnet;
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2017-02-02 12:07:40 +08:00
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// 模拟网络:模拟发送一个 udp包
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2012-05-07 00:48:58 +08:00
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int udp_output(const char *buf, int len, ikcpcb *kcp, void *user)
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{
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2016-07-20 16:22:13 +08:00
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union { int id; void *ptr; } parameter;
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parameter.ptr = user;
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vnet->send(parameter.id, buf, len);
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2012-05-07 00:48:58 +08:00
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return 0;
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}
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2017-02-02 12:07:40 +08:00
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// 测试用例
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2012-05-07 00:48:58 +08:00
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void test(int mode)
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{
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2017-02-02 12:07:40 +08:00
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// 创建模拟网络:丢包率10%,Rtt 60ms~125ms
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2012-05-07 00:48:58 +08:00
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vnet = new LatencySimulator(10, 60, 125);
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2017-02-02 12:07:40 +08:00
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// 创建两个端点的 kcp对象,第一个参数 conv是会话编号,同一个会话需要相同
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// 最后一个是 user参数,用来传递标识
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2012-05-07 00:48:58 +08:00
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ikcpcb *kcp1 = ikcp_create(0x11223344, (void*)0);
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ikcpcb *kcp2 = ikcp_create(0x11223344, (void*)1);
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2017-02-02 12:07:40 +08:00
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// 设置kcp的下层输出,这里为 udp_output,模拟udp网络输出函数
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2012-05-07 00:48:58 +08:00
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kcp1->output = udp_output;
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kcp2->output = udp_output;
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IUINT32 current = iclock();
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IUINT32 slap = current + 20;
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IUINT32 index = 0;
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IUINT32 next = 0;
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IINT64 sumrtt = 0;
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int count = 0;
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int maxrtt = 0;
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2017-02-02 12:07:40 +08:00
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// 配置窗口大小:平均延迟200ms,每20ms发送一个包,
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// 而考虑到丢包重发,设置最大收发窗口为128
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2012-05-07 00:48:58 +08:00
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ikcp_wndsize(kcp1, 128, 128);
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ikcp_wndsize(kcp2, 128, 128);
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2017-02-02 12:07:40 +08:00
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// 判断测试用例的模式
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2012-05-07 00:48:58 +08:00
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if (mode == 0) {
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2017-02-02 12:07:40 +08:00
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// 默认模式
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2012-05-07 00:48:58 +08:00
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ikcp_nodelay(kcp1, 0, 10, 0, 0);
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ikcp_nodelay(kcp2, 0, 10, 0, 0);
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}
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else if (mode == 1) {
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2017-02-02 12:07:40 +08:00
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// 普通模式,关闭流控等
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2012-05-07 00:48:58 +08:00
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ikcp_nodelay(kcp1, 0, 10, 0, 1);
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ikcp_nodelay(kcp2, 0, 10, 0, 1);
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} else {
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2017-02-02 12:07:40 +08:00
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// 启动快速模式
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// 第二个参数 nodelay-启用以后若干常规加速将启动
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// 第三个参数 interval为内部处理时钟,默认设置为 10ms
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// 第四个参数 resend为快速重传指标,设置为2
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// 第五个参数 为是否禁用常规流控,这里禁止
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2020-03-26 19:28:17 +08:00
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ikcp_nodelay(kcp1, 2, 10, 2, 1);
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ikcp_nodelay(kcp2, 2, 10, 2, 1);
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2016-06-03 20:28:21 +08:00
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kcp1->rx_minrto = 10;
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kcp1->fastresend = 1;
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2012-05-07 00:48:58 +08:00
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}
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char buffer[2000];
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int hr;
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IUINT32 ts1 = iclock();
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while (1) {
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isleep(1);
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current = iclock();
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ikcp_update(kcp1, iclock());
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ikcp_update(kcp2, iclock());
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2017-02-02 12:07:40 +08:00
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// 每隔 20ms,kcp1发送数据
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2012-05-07 00:48:58 +08:00
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for (; current >= slap; slap += 20) {
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2016-06-03 20:28:21 +08:00
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((IUINT32*)buffer)[0] = index++;
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((IUINT32*)buffer)[1] = current;
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2012-05-07 00:48:58 +08:00
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2017-02-02 12:07:40 +08:00
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// 发送上层协议包
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2012-05-07 00:48:58 +08:00
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ikcp_send(kcp1, buffer, 8);
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}
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2017-02-02 12:07:40 +08:00
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// 处理虚拟网络:检测是否有udp包从p1->p2
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2012-05-07 00:48:58 +08:00
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while (1) {
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hr = vnet->recv(1, buffer, 2000);
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if (hr < 0) break;
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2017-02-02 12:07:40 +08:00
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// 如果 p2收到udp,则作为下层协议输入到kcp2
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2012-05-07 00:48:58 +08:00
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ikcp_input(kcp2, buffer, hr);
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}
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2017-02-02 12:07:40 +08:00
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// 处理虚拟网络:检测是否有udp包从p2->p1
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2012-05-07 00:48:58 +08:00
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while (1) {
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hr = vnet->recv(0, buffer, 2000);
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if (hr < 0) break;
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2017-02-02 12:07:40 +08:00
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// 如果 p1收到udp,则作为下层协议输入到kcp1
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2012-05-07 00:48:58 +08:00
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ikcp_input(kcp1, buffer, hr);
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}
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2017-02-02 12:07:40 +08:00
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// kcp2接收到任何包都返回回去
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2012-05-07 00:48:58 +08:00
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while (1) {
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hr = ikcp_recv(kcp2, buffer, 10);
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2017-02-02 12:07:40 +08:00
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// 没有收到包就退出
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2012-05-07 00:48:58 +08:00
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if (hr < 0) break;
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2017-02-02 12:07:40 +08:00
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// 如果收到包就回射
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2012-05-07 00:48:58 +08:00
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ikcp_send(kcp2, buffer, hr);
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}
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2017-02-02 12:07:40 +08:00
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// kcp1收到kcp2的回射数据
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2012-05-07 00:48:58 +08:00
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while (1) {
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hr = ikcp_recv(kcp1, buffer, 10);
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2017-02-02 12:07:40 +08:00
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// 没有收到包就退出
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2012-05-07 00:48:58 +08:00
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if (hr < 0) break;
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IUINT32 sn = *(IUINT32*)(buffer + 0);
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IUINT32 ts = *(IUINT32*)(buffer + 4);
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IUINT32 rtt = current - ts;
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if (sn != next) {
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2017-02-02 12:07:40 +08:00
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// 如果收到的包不连续
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2012-05-07 00:48:58 +08:00
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printf("ERROR sn %d<->%d\n", (int)count, (int)next);
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return;
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}
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next++;
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sumrtt += rtt;
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count++;
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2014-12-29 00:43:25 +08:00
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if (rtt > (IUINT32)maxrtt) maxrtt = rtt;
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2012-05-07 00:48:58 +08:00
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printf("[RECV] mode=%d sn=%d rtt=%d\n", mode, (int)sn, (int)rtt);
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}
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if (next > 1000) break;
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}
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ts1 = iclock() - ts1;
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ikcp_release(kcp1);
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ikcp_release(kcp2);
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const char *names[3] = { "default", "normal", "fast" };
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2014-12-29 00:43:25 +08:00
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printf("%s mode result (%dms):\n", names[mode], (int)ts1);
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2016-06-03 20:28:21 +08:00
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printf("avgrtt=%d maxrtt=%d tx=%d\n", (int)(sumrtt / count), (int)maxrtt, (int)vnet->tx1);
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2012-05-07 00:48:58 +08:00
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printf("press enter to next ...\n");
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char ch; scanf("%c", &ch);
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}
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int main()
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{
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2017-02-02 12:07:40 +08:00
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test(0); // 默认模式,类似 TCP:正常模式,无快速重传,常规流控
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test(1); // 普通模式,关闭流控等
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test(2); // 快速模式,所有开关都打开,且关闭流控
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2012-05-07 00:48:58 +08:00
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return 0;
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}
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/*
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default mode result (20917ms):
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avgrtt=740 maxrtt=1507
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normal mode result (20131ms):
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avgrtt=156 maxrtt=571
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fast mode result (20207ms):
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avgrtt=138 maxrtt=392
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*/
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2020-03-26 19:37:48 +08:00
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